Jack



Sept. 261, 1933. M. T. Goss I 3,928,533?

JACK

Filed Jan. 2o, 1953 rwentor f 2J@ being understood that l .HACK

oro 'i'. einen columna, ..11, m,

im, 'Y

Application :uw i las This invention relates to motor vehicle 'jacks and more ,particularly to motor vehicle jacks of the hydraulic type, the primary object of the invention being to provide a jack of this character which maybe secured to the axle oi a vehicle, it being contemplated to provide four of these jacks for each vehicle, a jack being supported adjacent to each vehicle wheel.

Another object of the invention is to provide a I l0 lack which will operate rapidly with a true vertical movement under pressure directed to the jack, thereby against-the jack tilting under lateral strain. as is usual with well mown lever operated jacks.

With the foregoing and other objects in view,

which will alinear als the description proceeds, the

invention resides in the combination and nrement oi lli-:w and in the details ot consn'uction hereinafter. descri and claimed, it

es in the precise emomi u ent of the invention herein disclosed, n mi i' be e withinthe scope of what is ced, vithout dei.` l from the spirit ot the invenion. Referring to the dra:

d: 'i 1 is en elevational view of a jack construc in eccorce with the invention.

' 2 isa'sectionalview en on line 2 2 e l.. l

W :1' i f 3 is a. lonmtu i .mi sectional view f laf ugh the incl: in its orteilV position.

u .mi to the in define jack emes n lower cylinder 5, which its lower end closed by the plate o, which is to cylinder 5, by i ci the bolts i'.

The cylinder 5 is io with im: :w e q"f 1- providing hos t, sp im 9 ere mount#y through slots in t@ as elly shownby rr v .1. The ai 9 me f lo, while the we mds oi the ci.,

secured to rollers il mounon the l il' t are ed by the lower cylinder 5, and

wound around the rollers in such a waxy t the Springs will be further o es the cylindl a oi the jack are extended.

usitwillmntduetoconction, the sps i? eet to drew lthe cylin- 5@ der 5 to its no tion, or n position under the cover lo, thus telping the jack' to thelpo simon shown'in A on the iechis lieved.

l2 cover the hoi.

clearly l;-

e.: to the cap or cover i l oi the when` Figure 3 of the drawing, a cylinder indicated by the reference character 14 operates in the lower cylinder 5, the cylinder 14 being provided with recessesl `at opposite sides thereof, in which recesses spring` pressed pins 16 are mounted. 60 These spring 'pressed pins 156 move through Y grooves i7 formedelongitudinally ot the lower cylinder 5. f

' The upper ends of the grooves 17 are inclined laterally, and dene shoulders 18, against which @5 the spring pressed pins-16 engage, restricting movent of the cylinder li.' In order that a duid tight connection between cylinder lli and cylinder 5 will be t. a gket 19 is provided. Operating within the cylinder 14 is a cylinder l@ 2li, while the cylinder 21 operates in the cylinder 2o, the cylinders 2o and 21 being provided with .if grooves i7 and pins 16 which :ow e

which is provided with spring pr lo t move in the longitu e cylinder 2l. A

i o e r 22 is formed f i e een 23 that couni with the bm h 2d nl., .l with gn www; in which one end oi a tube not sho, may be secured; the tube www in couniectlon with e suitable source oi duid wir' in operating the jeclr. d Sectio :i socket support 25 is tted over the h 2li end secured in position by m oi the bolt 25'. This structure permits ot lateral oi the jack when ded, so that pt i to lateral p. The secret sort 'also curved npmr x mi pills ves il oij` ditions, under the ve- :1y-mi to Zlhymotescrews 2&endisotn to house the end oi the cylinders ne i en there ne new in neve u ll@ in connecticn with the cyiimiers' 2o and 21 and -member 22, for insuring a fluid tight connection therebetween.

From the foregoing it will be seen that due to this commotion, the telescoping cylinders of which the jack is formed, will be extended .under the `uid pressure directed to the cylinders,

resulting in the liftingof the article to which the jack has been fastened. When it is desired to return the cylinders to their -normal positions, it is only necessary to release the iluid, whereupon -the springs 9 will draw cylinder- 5 up, and telescope all cylinders, the jack being held by said springs 9 in the position shown by Figure 1 .of the drawing.

Having thus described the invention, what is claimed is: v

I claim: l

1. A hydraulic jack comprising telescoping cylinders, each cylinder having longitudinal grooves formed in' the 'inner surface thereof, the upper ends of the grooves being extended outwardly -dening shoulders, spring pressed pins carried by the cylinders and movable through the grooves, said pins engaging the shoulders to restrict Vshoulders to limit movement ofthe cylinders,

means for admitting fluid -to the cylinders to 'extend the cylinders, and meansvfor normally urging the cylinders to their telescoped positions.

3. 'A hydraulic jack comprising a plurality of telescoping cylindrical sections, means for admittingiluld to the sections to extend the sections, housings formed on the sides of the lowermost cylindrical section, coiled springs disposed within the housings, a cap carried by the uppermost section, said springs being connected to the cap and adapted to telescope the sections, when lpressure within the cylindrical sections is relieved.V

' MIIFORD T. GOSS; 

